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1
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2answers
42 views

Accessing fish functions from perl

In bash I can do: foo() { echo bar; } export -f foo perl -e 'system "bash -c foo"' I can also access the function definition: perl -e 'print "foo".$ENV{"BASH_FUNC_foo%%"}' How do I do the same ...
3
votes
2answers
68 views

How to use a bash function like a regular command in a pipe chain?

I'm performing several commands on large files from within a bash script. In order to monitor the progress I use the pv command. An example command could look like this cat $IN_FILE | pv -w 20 -s ...
10
votes
1answer
146 views

Track certain parameters on some command

Let's say that I have a command git branch (always with a couple of words) for example. What I want is to keep track of when this command is executed with arguments. For example, if I execute the ...
4
votes
2answers
87 views

Checking if a command is a built-in in ksh

How can I check if a command is a built-in command for ksh? In tcsh you can use where; in zsh and bash you can use type -a; and in some modern versions of ksh you can use whence -av. What I want to ...
0
votes
1answer
49 views

What's the best way to make a bash function in a script as a parameter when running via command line?

I'm fairly new to bash scripting, and wondered what's the simplest way to make bash script functions in a script as the parameter when run via command line? Example usage: ./myscript function1 ...
0
votes
0answers
20 views

Automated function Logging tool

Is there a automated tool for logging function name , function entry and exit parameters per thread for complex multi threaded application.(C / C++)
1
vote
1answer
30 views

Function tracing per thread

I have a complex multi threaded application running on a Cent OS 5.8 the application is coded using C and C++ I am searching for a FUNCTION TRACING tool which can help me do the following. Trace ...
1
vote
1answer
486 views

how to locally redefine 'command_not_found_handle'?

I'd like to make a particular bash script failfast when it cannot find a command, while retaining globally the usual friendly command_not_found behavior. E.g., if I save the following to /tmp/foo.sh, ...
0
votes
1answer
27 views

Aliasing a command with parameter supplied to another command

Namely: I want to alias tail -f to less +F but let tail with any other parameter supplied work the same way as before.
2
votes
3answers
69 views

What happens if I pass too few parameters to a shell function?

I would like to ask about passing parameters into functions. I tried this: function_name $var1 $var2 but usually (sometimes it printed error) it didn't make any difference whether I passed them or ...
2
votes
1answer
115 views

grom() keyword in bash throws unexpected '(' token

I'm not entirely sure why I'm getting the error in my .bash_profile syntax error near unexpected token `(' when I use the keyword grom() for my function. I wanted to create a bash function that ...
0
votes
2answers
44 views

Its possible use special characters in a shell function name?

I have to create the function in shell script, that function name must contain the special characters. like >() { echo $1 $2 } Here my function name is >, If its ...
1
vote
3answers
108 views

What is the reason for having numbers within the brackets of a function ? [duplicate]

I have seen on many occasions a name of a function (frankly speaking I just call it function because of it typical appearance, they are though sometimes named commands or system calls but I do not ...
1
vote
1answer
23 views

Sort packages by size one-liner as function

While surfing web I've discovered nice one-liner that suits my needs well expac -s "%-30n %m" | sort -hk 2 | awk '{print $1, $2/1024/1024}' | column -t| However all the functional needed I got used ...
0
votes
2answers
46 views

Bash function for piping data into protected file [duplicate]

I wanted to create a .bashrc function that would simplify passing data to a write-protected file. function pipe { sudo bash -c "$1" } Unfortunately the command pipe echo something > ...
1
vote
2answers
60 views

Bash: How to create an alias in .bashrc for awk with parameters

I'm trying to add an alias in .bashrc file as follows: ... alias cutf="_cutf" ... _cutf() { awk 'NR >= $2 && NR <= $3 { print }' < $1 } (The function's goal is to show the ...
7
votes
3answers
8k views

How to add a function to .bash_profile/.profile/bashrc in shell?

I have a function which converts epoch time to date. Here is the definition date1(){ date -d @$1 } I'd like to be able to write: $ date1 xxxyyy Where xxxyyy is the parameter I pass into my ...
1
vote
1answer
53 views

A basic function that doesn't work [duplicate]

I've tried several modifications to see why it's not working, but I can't find the answer. Here is my code, this is in french but this is just a normal fonction that ask to the user if he's ready to ...
2
votes
2answers
76 views

Bash command: is it possible to pass an argument before a custom command (function) or it must be only after:

I am wondering if it is possible to pass an argument to a custom command before the command? Let say I have custom command ping and I would like to pass the IP address before command: instead ping ...
6
votes
3answers
510 views

How to define a Bash function that can be used by different scripts

I have defined a bash function in my ~/.bashrc file. This allows me to use it in shell terminals. However, it does not seem to exist when I call it from within a script. How can I define a bash ...
3
votes
3answers
90 views

Write bash function which operates on list of filenames

I want to define the function cpfromserver in bash so that when I run $ cpfromserver xxx yyy zzz the result is the same as if I had typed $ scp user@remote.server:"/some/location/xxx/xxx.txt ...
2
votes
3answers
281 views

How can I pass on parameters 4..99 to another function

I'm calling a function and I want to pass up to 100 paramters onto another function. I do not want to pass on the first 3 params, I start with param4 being the first param for the other program. I ...
0
votes
0answers
32 views

Pass a function arguments?

How would you make a function that gets arguments? function arg_example { arg "c" # This is imaginary but it would return 'true' if it found the argument -c. did_find_arg=$? # Get the ...
3
votes
2answers
90 views

Why alias inside function does not work?

See the code below: a()(alias x=echo\ hi;type x;alias;x);a I have an alias inside a function, I do not want to change the external environment (that is why I am using () instead of {}), even the ...
2
votes
3answers
99 views

Is it possible to add a function within a function?

function update_profile { echo "1. Update Name" echo "2. Update Age" echo "3. Update Gender" echo "Enter option: " read option case $option in 1) update_name ;; ...
2
votes
4answers
1k views

Bash source — select the right function when two sourced files have the same function name?

My bash script sources a script file (call it file2.sh) according to an argument. (It is either sourced or not.) The script file2.sh contains a function "foo" (call it a modified or improved version ...
1
vote
1answer
60 views

Why doesn't my function work with spaces? (cd, dirname) [duplicate]

I have had this function I use it very often and it works fine. Here it is: cdx () { cd `dirname $1` ; } However, this does not work with spaces. When I use it like this for example cdx ...
0
votes
0answers
27 views

Broken mkdir command [duplicate]

I made an alias in my .bash_profile file with the same name as mkdir. It looked like this. alias mkdir='function _blah(){ mkdir "$1"; cd "$1" };_blah' After removing it, i notice that mkdir still ...
0
votes
1answer
21 views

Why urxvtc doesn't accetp zsh functions when called with a “-c” argument?

In order to launch a new terminal and run a zsh function on it, I am trying to run the following command from within an urxvtc terminal (the urxvtd is running as a systemd service) urxvtc -e zsh ...
3
votes
4answers
448 views

seek function in unix

I try to understand the seek(2) function from Unix version 6. This example: seek(0,0,2) So the first argument is the file descriptor. And 0 would be the standard input. The second argument is the ...
0
votes
1answer
59 views

Ugly bash function to send commands and “say” anything in screen over ssh. Is there a better way?

I’m working on a function this works but it is ugly. One thing that could be changed is being able to know the name of the screen. Using screen -dms minecraft java ….jar now starts a screen session ...
1
vote
4answers
125 views

Executing a command within `if` statement and on success perform further steps

I was trying to execute a program which will create a directory on the basis of a complete path provided to it from the prompt and, if the directory already exists it will return an error (for ...
5
votes
2answers
8k views

Passing a variable to a bash script when sourcing it in another bash script?

Suppose I have in main.sh: $NAME="a string" if [ -f $HOME/install.sh ] . $HOME/install.sh $NAME fi and in install.sh: echo $1 This is supposed to echo "a string", but it echoes nothing. Why? ...
3
votes
2answers
538 views

forward function and variables into sudo su - <user> <<EOF

I have declared functions and variables in bash/ksh and I need to forward them into sudo su - {user} << EOF: #!/bin/bash log_f() { echo "LOG line: $@" } extVAR="yourName" sudo su - ...
4
votes
1answer
80 views

Calling `source` from bash function

I'm trying to source a file whose name is passed from stdin. My plan is to create a function like this: mySource() { # get stdin and pass it as an argument to `source` source $(cat) } to be ...
1
vote
1answer
671 views

getopts - how to avoid read next $OPTARG as argument?

Just started use getopts and found one problem... For example - have a script with: while getopts "h:loav" opt; do case $opt in h) h=$OPTARG echo $h ;; But whet I run it: $ ./ftpclean.sh -h ...
1
vote
3answers
660 views

What return/exit values can I use in bash functions/scripts?

I want to know what return values we can use that will not be mistaken by for ex. SIGINT? ex.: $sleep 10 $#hit ctrl+c $echo $? 130 so I know I must not use anything like return 130 or exit 130 so ...
1
vote
1answer
64 views

How do I define alias with variables which can be changed at runtime?

This is probably a very easy to answer question, but I could not find any questions already asking this due to different wording when writing titles. Running help alias on my bash prompt returns only ...
6
votes
1answer
198 views

Function that calls another function with list of arguments doesn't work

In my .bash_aliases I have defined a function that I use from the command line like this: search -n .cs -n .cshtml -n .html SomeTextIWantToSearchFor /c/code/website/ /c/stuff/something/whatever/ ...
2
votes
1answer
88 views

How to print the code of a shell function in terminal?

I am using zsh and I have defined few utility shell function in some shell scripts, few of them called from ~/.zshrc, so let's assume that the we don't know the location of these functions. One ...
21
votes
7answers
10k views

Can I “export” functions in bash?

source some_file some_file: doit () { echo doit $1 } export TEST=true If I source some_file the function "doit" and the variable TEST are available on the command line. But running this script: ...
2
votes
1answer
285 views

set -xv behavior in ksh vs bash

Normally I like to have all of the debug output of a script go to a file, so I will have something like: exec 2> somefile set -xv This work very will in bash, but I have noticed in ksh it ...
1
vote
0answers
89 views

export -f in .bashrc after upgrade to bash 4.3.30 kills builtins?

I recently upgraded my bash (Mac OS X 10.6.8) from 3.2.48(1) to 4.3.30(1) via macports, and while the install seems to have gone smoothly, the two spots in my ~/.bashrc where I had export -f myfunc; ...
1
vote
1answer
838 views

How to use defined function with xargs

This is my code #!/bin/bash showword() { echo $1 } echo This is a sample message | xargs -d' ' -t -n1 -P2 showword So I have a function showword which echoes whatever string you pass as a ...
8
votes
1answer
332 views

Why does bash even parse/run stuff put in the environment variable?

The shellshock bug in bash works by way of environment variables. Honestly I was suprised by the fact that there is such a feature like: "passing on of function definitions via env vars" Therefore ...
26
votes
4answers
3k views

difference between “function foo() {}” and “foo() {}”

I can define bash functions using or omitting the function keyword. Is there any difference? #!/bin/bash function foo() { echo "foo" } bar() { echo "bar" } foo bar Both calls to functions ...
1
vote
1answer
822 views

/bin/sh: error importing function definition for `some-function'

I encountered this error when updating bash for the CVE-2014-6271 security issue: # yum update bash Running transaction (shutdown inhibited) Updating : bash-4.2.47-4.fc20.x86_64 /bin/sh: error ...
13
votes
4answers
6k views

Executing user defined function in a find -exec call

I'm on Solaris 10 and I have tested the following with ksh (88), bash (3.00) and zsh (4.2.1). The following code doesn't yield any result: function foo { echo "Hello World" } find somedir -exec ...
7
votes
3answers
545 views

Bash Function Decorator

In python we can decorate functions with code that is automatically applied and executed against functions. Is there any similar feature in bash? In the script I'm currently working on, I have some ...
5
votes
1answer
538 views

How does VARIABLE=() { function definition } work in bash

I have seen something like this in my bash ENV: module=() { eval `/usr/bin/modulecmd bash $*` } How does this construct work? What is it called? I'm not asking about modulecmd, I am asking about ...